.instalist{
    display: flex;
    flex-wrap: wrap;
}

.instalist li{
    width:calc( (100% - 4.5%) / 4 ); 
}

.instalist li:nth-of-type(3n){
    margin-left:1%;
}

.instalist li:nth-of-type(3n + 1){

}

.instalist li:nth-of-type(3n + 2){
    margin-left:1.5%;
}

.instalist li a{
    display: block;
    position: relative;
    width: 100%;
    background-size: cover;
    background-position: center;
}

.instalist li a:before{
    content: "";
    display: block;
    padding-top: 100%;
}

.instalist li a img{
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

.p-cb__item--wysiwyg .loopimg{
    display: none;
}

@media screen and (max-width: 640px) {
  .instalist .comme{
    display: block;
  }
  .instalist li{
    width:calc( (100% - 3%) / 2 ); 
    margin-top: 3%;
  }

  .instalist li:nth-of-type(3n){
      margin-left:0%;
  }

  .instalist li:nth-of-type(3n + 2){
      margin-left:0%;
  }

  .instalist li:nth-of-type(2n){
      margin-left:3%;
  }

}